enlightenment: Ensure we have a valid menu comp object before calling
enlightenment: Ensure we have a valid menu comp object before calling

Summary:
evas functions

This fixes an issue when quickly mousing through menus can cause a
segfault in Enlightenment due to menu->comp_object being NULL

ref T7030

Reviewers: zmike

Reviewed By: zmike

Subscribers: cedric

Tags: #efl, #enlightenment22

Maniphest Tasks: T7030

Differential Revision: https://phab.enlightenment.org/D6641

tasn/enlightenment,tasn/enlightenment,tasn/enlightenment